/* ============================================
   Executive Corporate Pro - Portfolio Template
   Professional Corporate Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --bg-primary: #F9FAFB;
    --bg-secondary: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --accent-primary: #2563EB;
    --accent-secondary: #0D9488;
    --border-color: #E5E7EB;
    
    /* Typography */
    --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.7vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --font-size-3xl: clamp(2rem, 1.7rem + 1.5vw, 2.5rem);
    --font-size-4xl: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    --header-height: 72px;
    
    /* Transitions */
    --transition-fast: 250ms ease;
    --transition-base: 350ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Section Base */
section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    height: var(--header-height);
    transition: box-shadow var(--transition-fast);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--accent-primary);
}

/* Navigation */
.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

/* Hero Section */
.hero {
    padding-top: calc(var(--header-height) + var(--spacing-3xl));
    padding-bottom: var(--spacing-3xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text {
    max-width: 600px;
}

.hero-name {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.hero-bio {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    background-color: #1D4ED8;
    border-color: #1D4ED8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Hero Social */
.hero-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-secondary);
    transform: translateY(-2px);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.skill-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.skill-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.skill-icon i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.skill-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.skill-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.project-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.project-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.project-content {
    padding: var(--spacing-lg);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-tag {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--accent-secondary);
    background-color: rgba(13, 148, 136, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
    transition: gap var(--transition-fast);
}

.project-link:hover {
    gap: 0.75rem;
}

/* Experience Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--accent-primary);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    border: 2px solid var(--bg-secondary);
}

.timeline-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.timeline-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.timeline-company {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--accent-primary);
}

.timeline-period {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.timeline-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Education Section */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.education-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.education-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.education-header {
    margin-bottom: var(--spacing-sm);
}

.education-degree {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.education-school {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--accent-primary);
}

.education-period {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.education-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Contact Section */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.contact-item:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.contact-icon i {
    font-size: 1.25rem;
    color: var(--accent-primary);
}

.contact-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.contact-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.contact-social .social-link {
    width: 48px;
    height: 48px;
}

.contact-social .social-link i {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    padding: var(--spacing-lg) 0;
}

.footer-text {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 400ms ease, transform 400ms ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        gap: var(--spacing-2xl);
    }
    
    .avatar {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }
    
    /* Mobile Navigation */
    .nav-toggle {
        display: block;
    }
    
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-md) 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm) var(--container-padding);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-link:hover,
    .nav-link.active {
        background-color: var(--bg-primary);
    }
    
    /* Hero */
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        max-width: 100%;
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .avatar {
        width: 200px;
        height: 200px;
    }
    
    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    /* Skills */
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* Education */
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-xl);
    }
    
    /* Skills */
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    /* Hero */
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    /* Timeline */
    .timeline-item {
        padding-left: var(--spacing-lg);
    }
    
    .timeline-header {
        flex-direction: column;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav-toggle,
    .hero-actions,
    .hero-social,
    .contact-social {
        display: none;
    }
    
    .hero {
        padding-top: var(--spacing-xl);
        min-height: auto;
    }
    
    section {
        padding: var(--spacing-lg) 0;
        page-break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}